Electromagnetic-assisted laser drilling method and device

Abstract

The invention provides an electromagnetically-assisted laser drilling method. The method includes the steps of 1, clamping a workpiece to be processed onto an electromagnetically-assisted laser drilling device; 2, driving a fixture base to rotate by a motor so that a permanent magnet clamped on the fixture base rotates at high speed and forms a rotational magnetic field; meanwhile, allowing a mouse cage in the rotational magnetic field to produce electromagnetic force whereby the workpiece rotates in sync with the mouse cage; 3, after the speed of the motor stabilizes to a preset value, starting a laser, which generates a laser beam acting on the surface of the workpiece via a focusing lens so as to finish the electromagnetically-assisted laser drilling process. According to the method, the application of the operating method of rotating the workpiece enhances the assistance of the magnetic field in laser drilling; meanwhile, the rotational magnetic field can control motion of plasma and molten metal generated in the laser drilling process, so that laser drilling effect is optimized. The invention further provides the electromagnetically-assisted laser drilling device.

Description

technical field [0001] The invention belongs to the field of laser processing, and in particular relates to an electromagnetic-assisted laser drilling method and device. Background technique [0002] In mechanical processing, hole processing is an important processing procedure with a relatively large proportion. With the miniaturization of parts and mass production, it is difficult for ordinary mechanical drilling methods to realize the manufacture of large quantities of small holes and micro holes. Laser Drilling is one of the key technologies in the field of modern manufacturing technology. Compared with other drilling methods, laser drilling has a large depth-to-diameter ratio, no contact, no tool loss, fast processing speed, small surface deformation, and can process various The remarkable superiority of materials, etc., can well meet the requirements of modern industrial product processing, and has been widely used, such as the processing of heat dissipation holes of a...

AI Technical Summary

Problems solved by technology

However, the existing laser drilling method has the following disadvantages: 1. The plasma shielding effect is serious in the laser drilling process, which causes the loss of laser energy; 2. There is a recast layer with uneven thickness on the hole wall after processing, which affects the quality of the hole; 3. The impact force generated during the high-energy and long-pulse laser drilling process is too large, resulting in low repeatability of the processed holes, micro-cracks on the hole wall, and difficult to improve the quality of the holes.

[0004] Although there are methods and units for magnetic field-assisted laser welding in the prior art (such as the Chinese invention patent "A Magnetic Field-Assisted Laser Welding Unit" with the patent number of 200410101556.6), due to the different characteristics of laser welding and drilling, laser Soldered units are not suitable for laser drilling

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